Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1de1a2c23c7bd4…

MALICIOUS

PDF

47.5 KB Created: 2021-10-03 16:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 8f3977d56b3ee0a78d200099b7c7043e SHA-1: b0f9840b4e8ae408db0733da6713b5c872b30be3 SHA-256: 0b1de1a2c23c7bd4ec819e43f01f25da1c476d509ee9c568c718bf0dc391bed1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to other PDF files hosted on various domains, indicating a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6808

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://stylekd.ru/files/kupuzemusupuzafin.pdf In PDF document text
    • http://baovecongtruong.com/upload/files/lunekopabulojisupog.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/xafimiwirurosogi.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/43587850253.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/68052690769.pdfIn PDF document text
    • http://wellgroup.cz/UserFiles/File/11607009167.pdfIn PDF document text
    • https://highrise.pl/file/58044869825.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/99886751275.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/02be17b16d4e303a2c07f10b738a5b3c/jamakoxuxufixumorenujo.pdfIn PDF document text
    • http://exosushi.com/uploads/files/jaxup.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/51096059508.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/27832561738.pdfIn PDF document text
    • https://karapinler.com/calisma2/files/uploads/27621691077.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387885e3cf6---pojop.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/82269261586.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/bemedatosavu.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/96476429883.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/vuguve.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/mijasutodu.pdfIn PDF document text
    • https://cooperspick.com/files/1502637095.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/65340431302.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/xakovufosagovetasadotifet.pdfIn PDF document text
    • http://tries.cz/media/images/upload/file/kobinajupadinifozorerom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=rime+of+the+frostmaiden+guidePDF link annotation